Those under bed boxes are great, but these big pieces are just a little too deep to fit. I've seen other folks just line them up on the floor against the walls, but the baby tries to stand on them, which isn't safe, and I like the floor to be easy to clean. Hmmm...I haven't tried the house and barn open, not folded, will see if that can fit under the bed. The garage definitely seems too deep though, although if it's only the one piece, maybe it can go on top of the cubes. Off to try it...any other suggestions?